[v4] PCI: dwc: Add PCI ID for LECARC PCIe pmu

[PATCH v4 v4] PCI: dwc: Add PCI ID for LECARC PCIe pmu

Posted by Braden Zhang 3 days, 18 hours ago

From: Brett Zhou <brett_zhou@lecomputing.com>

This patch adds support for the PCIe PMU found
on LECARC SoCs.

LECARC platforms use the standard DesignWare PCIe Controller,
and the existing DWC driver already handles the enumeration
and basic functionality through the generic PCIe core.
This patch only adds the PCI vendor ID to the vendor-specific
capability (VSEC) list, which enables the standard DWC
RAS/DES feature detection.

Signed-off-by: Brett Zhou <brett_zhou@lecomputing.com>
Signed-off-by: Braden Zhang <braden_zhang@lecomputing.com>
---
Changes in v4:
- Doc: Update description for the DWC RAS/DES feature detection.
- Link to v3: https://patch.msgid.link/20260713-pcie-pmu-v3-1-5e4a8d82248d@lecomputing.com

Changes in v3:
- Update: move definition to pcie-dwc.h a
- Format: Update the subject line to follow the style of previous pcie-dwc.h changes.
- Link to v2: https://patch.msgid.link/20260710-pcie-pmu-v2-1-a3d73d4d9051@lecomputing.com

Changes in v2:
- Format: repalce space with tab to separate the macro name and the value.
- Link to v1: https://patch.msgid.link/20260710-pcie-pmu-v1-1-1519e580313f@lecomputing.com

To: Bjorn Helgaas <bhelgaas@google.com>
To: Jingoo Han <jingoohan1@gmail.com>
To: Manivannan Sadhasivam <mani@kernel.org>
Cc: linux-pci@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 include/linux/pcie-dwc.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/pcie-dwc.h b/include/linux/pcie-dwc.h
index 8ff778e7aec0..0df5fa81b561 100644
--- a/include/linux/pcie-dwc.h
+++ b/include/linux/pcie-dwc.h
@@ -11,6 +11,8 @@
 
 #include <linux/pci_ids.h>
 
+#define PCI_VENDOR_ID_LECARC           0x0720
+
 struct dwc_pcie_vsec_id {
 	u16 vendor_id;
 	u16 vsec_id;
@@ -32,6 +34,8 @@ static const struct dwc_pcie_vsec_id dwc_pcie_rasdes_vsec_ids[] = {
 	  .vsec_id = 0x02, .vsec_rev = 0x4 },
 	{ .vendor_id = PCI_VENDOR_ID_SAMSUNG,
 	  .vsec_id = 0x02, .vsec_rev = 0x4 },
+	{ .vendor_id = PCI_VENDOR_ID_LECARC,
+	  .vsec_id = 0x02, .vsec_rev = 0x4 },
 	{}
 };
 

---
base-commit: a635d6748234582ea287c5ffeae28b9b23f91c7e
change-id: 20260710-pcie-pmu-5ef78c56c3b6

Best regards,
--  
Braden Zhang <braden_zhang@lecomputing.com>

Re: [PATCH v4 v4] PCI: dwc: Add PCI ID for LECARC PCIe pmu

Posted by Manivannan Sadhasivam 3 days, 18 hours ago

On Tue, Jul 21, 2026 at 02:21:13PM +0800, Braden Zhang wrote:
> From: Brett Zhou <brett_zhou@lecomputing.com>
> 
> This patch adds support for the PCIe PMU found
> on LECARC SoCs.
> 
> LECARC platforms use the standard DesignWare PCIe Controller,
> and the existing DWC driver already handles the enumeration
> and basic functionality through the generic PCIe core.
> This patch only adds the PCI vendor ID to the vendor-specific
> capability (VSEC) list, which enables the standard DWC
> RAS/DES feature detection.
> 
> Signed-off-by: Brett Zhou <brett_zhou@lecomputing.com>
> Signed-off-by: Braden Zhang <braden_zhang@lecomputing.com>

I don't know what's wrong here, but this message id
(20260721-pcie-pmu-v4-1-850a4e695b19@lecomputing.com) is not found in lore. So
can't apply with b4.

- Mani

> ---
> Changes in v4:
> - Doc: Update description for the DWC RAS/DES feature detection.
> - Link to v3: https://patch.msgid.link/20260713-pcie-pmu-v3-1-5e4a8d82248d@lecomputing.com
> 
> Changes in v3:
> - Update: move definition to pcie-dwc.h a
> - Format: Update the subject line to follow the style of previous pcie-dwc.h changes.
> - Link to v2: https://patch.msgid.link/20260710-pcie-pmu-v2-1-a3d73d4d9051@lecomputing.com
> 
> Changes in v2:
> - Format: repalce space with tab to separate the macro name and the value.
> - Link to v1: https://patch.msgid.link/20260710-pcie-pmu-v1-1-1519e580313f@lecomputing.com
> 
> To: Bjorn Helgaas <bhelgaas@google.com>
> To: Jingoo Han <jingoohan1@gmail.com>
> To: Manivannan Sadhasivam <mani@kernel.org>
> Cc: linux-pci@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
>  include/linux/pcie-dwc.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/linux/pcie-dwc.h b/include/linux/pcie-dwc.h
> index 8ff778e7aec0..0df5fa81b561 100644
> --- a/include/linux/pcie-dwc.h
> +++ b/include/linux/pcie-dwc.h
> @@ -11,6 +11,8 @@
>  
>  #include <linux/pci_ids.h>
>  
> +#define PCI_VENDOR_ID_LECARC           0x0720
> +
>  struct dwc_pcie_vsec_id {
>  	u16 vendor_id;
>  	u16 vsec_id;
> @@ -32,6 +34,8 @@ static const struct dwc_pcie_vsec_id dwc_pcie_rasdes_vsec_ids[] = {
>  	  .vsec_id = 0x02, .vsec_rev = 0x4 },
>  	{ .vendor_id = PCI_VENDOR_ID_SAMSUNG,
>  	  .vsec_id = 0x02, .vsec_rev = 0x4 },
> +	{ .vendor_id = PCI_VENDOR_ID_LECARC,
> +	  .vsec_id = 0x02, .vsec_rev = 0x4 },
>  	{}
>  };
>  
> 
> ---
> base-commit: a635d6748234582ea287c5ffeae28b9b23f91c7e
> change-id: 20260710-pcie-pmu-5ef78c56c3b6
> 
> Best regards,
> --  
> Braden Zhang <braden_zhang@lecomputing.com>
> 

-- 
மணிவண்ணன் சதாசிவம்

Re: [PATCH v4 v4] PCI: dwc: Add PCI ID for LECARC PCIe pmu

Posted by Braden Zhang 3 days, 16 hours ago

Hi Mani,

Thank you for your review and for pointing out the issue.

You are correct. I realized the patch was missing a PGP signature, which is
why it's not being properly recognized by the mailing list and `b4`.

I have now added the missing PGP signature and regenerated the patch as v5.
The new version should be correctly picked up by the tooling.

Best regards,
Braden Zhang

Re: [PATCH v4 v4] PCI: dwc: Add PCI ID for LECARC PCIe pmu

Posted by Braden Zhang 3 days, 16 hours ago

Hi Mani,

Thank you for your review and for pointing out the issue.

You are correct. I realized the patch was missing a PGP signature, which is
why it's not being properly recognized by the mailing list and `b4`.

I have now added the missing PGP signature and regenerated the patch as v5.
The new version should be correctly picked up by the tooling.

Best regards,
Braden Zhang